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A152409 Column 2 of triangle A152406; also, column 0 of matrix cube of A152406. 4
1, 3, 18, 150, 1546, 18642, 254690, 3861782, 64059002, 1150296082, 22180511810, 456345207854, 9966036502994, 230031203755906, 5591166290510722, 142661974171422254, 3810825154126609202, 106314217107440685858 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Matrix powers of triangle T=A152406 satisfy:

column k of T^(j+1) = column j of T^(k+1) for all j>=0, k>=0.

LINKS

Table of n, a(n) for n=0..17.

CROSSREFS

Cf. A152406; A152407, A152408, A152410.

Sequence in context: A240921 A221961 A138420 * A200320 A207569 A005412

Adjacent sequences:  A152406 A152407 A152408 * A152410 A152411 A152412

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Dec 05 2008

STATUS

approved

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Last modified August 3 14:55 EDT 2021. Contains 346438 sequences. (Running on oeis4.)